CVE-2026-88831: Busybox: busybox: httpd silently fails open when ip deny rules contain invalid cidr prefix lengths

Overview

Severity

Medium (CVSS 5.3)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploit Status

Not Exploited

Patch Tuesday

2026-Sep

Released

2026-10-01

Last Updated

2026-10-01

EPSS Score

0.24% (percentile: 13.2%)

Affected Products (1)

Other

• 21821-17084

Revision History

• 2026-10-01: Information published.
• 2026-10-01: Information published.